Abstract : Experimental measurements of the intrinsic thermal radiation of the moon were made by a telescope with a photoconductive cell of germanium alloyed with zinc and compensated by antimony and by a tower solar telescope with an optical-acoustic receiver. Isotherms of a small region of the moon at various phases are plotted. Transition from radiation fluxes obtained with measurements to temperature is carried out by reference (tying) to absolute measurements. (Author)